XERCES: Project Milkweed
"The loss of milkweed plants in the monarch’s spring and summer breeding areas across the United States is believed to be a significant factor contributing to the reduced number of monarchs recorded in overwintering sites in California and Mexico."
Download the Eastern US Fact Sheet
Monarch Watch !
Monarch migration, lifecycle, raising monarchs, all about milkweed, etc.
Huge resource for monarch butterflies. Enjoy!
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